[DragonFlyBSD - Bug #3092] dumpon: sysctl: kern.dumpdev: Device busy
bugtracker-admin at leaf.dragonflybsd.org
bugtracker-admin at leaf.dragonflybsd.org
Wed Oct 25 02:09:54 PDT 2017
Issue #3092 has been updated by liweitianux.
swildner wrote:
> I think once set, you first have to 'dumpon off' before being able to set it again.
True. Once I "dumpon off", I can "dumpon" another device to make the change. Thanks.
However, the current error message is unhelpful, which should be improved... And the dumpon(8) man page needs a note, something like:
Once the dump device is set, it must be first turned off using "dumpon off" before the new dump device can be set.
Maybe a new option can be added to take care of this. In addition, the "dumpon off" seems a bit wired... I think a symlink as "dumpoff" may be a good choice.
Cheers,
Aly
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Bug #3092: dumpon: sysctl: kern.dumpdev: Device busy
http://bugs.dragonflybsd.org/issues/3092#change-13297
* Author: liweitianux
* Status: New
* Priority: Normal
* Assignee:
* Category: Kernel
* Target version:
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Hello, I had the problem that "dumpon" couldn't let me change the dump device, which complained "Device busy", as shown below:
dfly# dumpon /dev/serno/WD-WCAS25235448.s1b
dumpon: sysctl: kern.dumpdev: Device busy
(I previously wrongly configured the "dumpdev" to be "/dev/mapper/swap", which is the mapped name of the dm-crypt'ed swap device. Therefore I used "dumpon" to change the dump device the underlying swap device but failed, as shown here.)
In addition, I also did such a test within a virtual machine using DFly-5.0. After partitioned the swap partition, I can "dumpon" to it successfully at the first time, but later it fails with "Device busy" error. See also the attached screenshot.
I suspect this issue exists in the "setdumpdev()" function in "sys/kern/kern_shutdown.c".
Cheers,
Aly
---Files--------------------------------
dfly.dumpon.devicebusy.png (10.3 KB)
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